Slug casting mold



NOV. 3, 1931. v PAINE 1,830,617

SLUG CASTING MOLD Filed Feb. 3, 1930 2 Sheets-Sheet l Q m w M NVENlfOR A TTORJ'FE Nov. 3, 1931. A. P. PAINE SLUG CASTING MOLD Filed Feb. 5, 9

2 Sheets-Sheet 2 characters of the matrices.

Patented Nov. 3, 1931 I UNlTED-J STFAITES' ARTHURP. PAINE, on

PATENT OFFICE,

NEW YoRK,1v.Y., AssIGNo n 'ro ranaemvrnnnna LINOTYPE COM- 7' PANY, A CORPORATION or Your: I

SLUG CASTING MOLD Application filed February '3, 1930. Serial No. 425,361.

This invention relates to slug casting machines, such as-linotype machines of the general organization represented in U. S. Letters Patent to O. Mergenthaler, No. 436,532, wherein a melting pot is arranged to deliver molten metal into a slotted mold and up against a comp-osed line of matrices toproduce a type bar or slug bearing on its edge type characters corresponding to the intaglio As these molds are usually constructed, the side walls of the moldslot or cavity are formedby a bottom or body portion and an upper or cap portion, while the end walls are formedby two end ,5: portions or liners heldin place between the body and cap portions. Ordinarily, the molds are made to produce slugs not exceeding 80 ems in length, but for certain classes of work, such as advertising or book Work, the molds 01 are made to produce slugs running as high as l2 ems in length and pt. or more in thickness.

In the production of slugs above 12 pt. thickness, whether they be cast in the regular molds of standard height or in low furniture molds, it is desirable that they be light in weight yet of strongand durable construction. It is the practice, therefore, to cast such slugs in skeleton form, the regular mold being usually provided with a series of core sections integral with the mold cap to produce cavities in oneof the side faces of the cast slug, and the furniture mold (whose side faces should be smooth and unbroken for reasonswell-known' to the art) being usually provided with a single core member centrally positioned within the mold cavity andextending throughout the length thereof to produce a corresponding cavity within the body of the slugsor between its solid side faces. In the commercial furniture molds, the core member is ordinarily supported at its opposite ends by the liners of'which it is or may bean integral part and, like other adjacent portions of the mold, is made of hardened steel. It is thus necessary to observe certain precautions in the design of'the core member in order that it may be capable of resisting the warping tendencies to which it is subject when the mold is in use. In other words, the size 7 24 pt. in thickness.

and form of the cores cross section is largely determined by its length and, as ordinarily constructed, its width is but slightly less than the height of the mold.

v.l/Vhile the commercial furniture molds are capable of producing slugs ranging in thickness above a minimum of 24 pt., the core member for slugs of less thickness wouldhave to be much too thin to maintain its original shape under ordinary casting conditions, particularly if the mold were more than 30 ems in length. Furthermore, due to the width of the core member, the casting sur-.

faces thereof offer considerable resistance to the ejection of the slugs and, in slugs of the maximum, thickness, are likely to cause damage to the ejector blades or a jamming of the mechanism. v

The present invention is intended to 0bviate the above and other objections, and contemplates a furniture mold construction wherein the core member may be of any suitable s ze or cross-sect1on irrespective of. the

size of the mold or of the warping tendencies of the metalof the core. proposed specifically to support the core member at the back of the mold by the cap and body portions at various selected points throughout its length, instead of'at its opposite ends or by the mold liners only, so that all strains or stresses due to the expansion and contraction of the core during the slug casting periods may be transmitted directly to themold at the points of support. As thus supported, the core member may be made with relatively narrow casting surfaces To this end, it is to facilitate the ejection of the slugs; and, if I prises a series of sections which are adapted to enter the mold cavity as the mold is car-' form and by way of example and as applied to a particular type of mold, but obviously many changes and variations may be made therein and in its mode of application which will still be comprised within its spirit. 1t should, therefore, be understood that the invention is not limited to any specific form or embodiment except insofar as such limitations are specified in the claims. Referring to thedrawings': Fig. l is a perspective View of a mold, partially disassembled, equipped with the present improvements;

Fig. 2 is a perspective view of the rear core. member detached;

'Fig. 3 is a vertical section through the mold and parts associated therewith; V Fig. 4 is a horizontal section taken on'the line e'4 of Fig, 3; and

Fig. 5 is a perspective view of a slug cast in the improved mold.

lVhile the invention has been herein illustrated as applied to a 42 em mold of the composite type disclosed in the patent to R. R'Meacl, No. 1,568,386, it is equally applicable to the standard unrecessed'molds and to unrecessed molds of other types. 7 T -Generaily, the mold proper (here shown as of the furniture type) comprises the body A, the cap 13, and the intermediate liners C, D, these parts being held together in assembled relation by post-s E rising from the body A and engaging in notches formed in the opposite ends of the cap B. The mold body A (see Figs. land 3) is made'up of an inner hardened-steel base portion A constituting the lower side wall of the inoldcav ity, and an outer unhardened steel reinforc- 7 ing portion A the two portions having a machined fit and being held together by clampingjscrews A Likewise, the mold cap B is made up of an inner hardened steel base portion B constituting the upper side wall of the mold cavity, and an outer unhardened steel reinforcing portion 13*, the two sections also having a machined lit and held together ported in the first elevator G"(see broken .plungers and the casting of the slug. After the cast, the mold disk is retracted to break its engagement with the marix line or quad block and then rotated to carry the mold to the slug ejecting position, all as is well understood in the art. A i The core member J of the improved furniture mold (Fig. 3) is centrally positioned as usual transversely of the mold cavity with its r'earedge flush withthe back of the mold,

and thetop andbottom faces thereof converge toward the front so as to facilitate their disengageinentfrom the slug at the time of ejection. In 'the present instance, however, the core member J is supportedby both the capand body portions of the mold, being provided at seleictedpoints along its rear edge with three upper supporting arms J 1 secured by counter-sunk screws j to the base portion B of the cap, and with three lower supporting arms J vertically aligned with the respective arms" J and secured by similar 1 screws y' to the base portion A of the mold body. While agreater number of supporting arms might be employechthe three sets shown have'been found in practice to be quite satisfactory.

The upper arms J 1 are mounted in transverse cuts or recesses 6 formed in the base portion B of the cap B, and the lower arms J are similarly mounted in corresponding recesses a formed in the base portion A of the body A, so that the arms will be rigidly supported in a lateral direction and a smooth even surface presented to the mouthpiece F of the metal pot; In this connection, it may be noted (see Figs. 1 and 3) that the free ends of thearmsJ J are flush with the outer side faces of the'base portions A B respectively, and abutsquarely against the under-faces of the reinforcing portions- A B 'Consequently, any vertical strains or stresses set up in theco're member will be transmitted directly to the said rein-forcing portions of the mold instead'of to the screws j, j. matter of fact', the screws merely serve to maintain-the core member in place against the back of the mold, all'other strains or stresses (which are mainly in a forward direction) being fully borne or absorbed by the base portionsA and B The core member J, in the present embodiment, is of exactly the same length as that of the mold cavity, and the supporting arms J J -thereof are arranged, one pair at each extreme end of the core, and the third pair about midway of its length. The ends of the core member, it will be observed (see Figs. 1 and 4) ,fit closely against the inner or cast.-

1-15 As a ing faces of the liners C, D, and these faces are made perfectly square instead of being formed with the usual rib or lip at their rear ed es.

he particular form and relation-of the parts just described, while not absolutely essential, are desirable for the reason that the slug M' (Fig. 5) cast in the mold will be formed at its opposite ends with transverse notches m, which are produced therein by the corresponding pairs of arms J J These notches m serve in place of the customary noiches produced in the slugs by the liner ribs without destroying the general symmetry of the slug. Moreover, the presence of the core supporting arms does not prevent the use of the sectional ejector blade employed in the commercial linotype machine, since the location of the arms is such as merely to necessitate. the removal of three sections of said blade, namely, the uppermost and lowermost sections to clear the end supporting arms J the middle section to clear the intermediate supporting arm J It is to be noted (see Figs. 3 and i) that the core member J extends forwardly from the back of the mold slightly less than halfway through the mold cavity. The longitudinal recess m formed thereby in the base of the slug M might therefore, as previously stated, be insufficient in itself to reduce the weight of the slug to the extent desired. Hence, the quad block K is provided with a series of core sections K and a corresponding series of intervening notches K the core sections K being adapted to produce recesses m in the top face of the slug M, and the notches K transverse ribs m located between said slug recesses.

The core sections K are made preferably of the same width as that of the core member J, so that when the mold is in casting posi tion against the quad block K they will eX- tend into the mold cavity a like distance from the front with their rear faces in predetermined spaced relation to the front face of the core J. There is thus produced in the slug M, between the recesses m and m a horizontal rib m which extends throughout the length of the slug (see Fig. 5). This rib m together with the transverse ribs m give the slug great rigidity and enable it easily to withstand the lateral pressure to which it is subjected when clamped in the printing form. The upper and lower faces of the core sections K (Fig, 3), as well as the end faces thereof (Fig. 4), converges rearwardly in order to facilitate their disengagement from the slug as the mold disk F is backed away from the quad block preparatory to the rotation of the disk to the slug ejecting position. The core sections K being supported free and clear of the mold at the time of the ejection of the slug, in no way interfere with that operation.

If desired, the front core sections K couldthe rear core .member J, but by leaving a continuous uninterrupted space between the cores, the slug is cast with the central horizontal rib m, which is desirable, and moreover the molten metal may be forcedinto the mold from a single series of discharge orifices (as shown in Fig. 3) and still flow around the core sections and fill the mold cavity completely Without dilhculty.

Other advantages flowing from the improved mold might be mentioned, but enough has been said to indicate the advance made inthe art Having thus described my invention, what Iclaim-is: l 1. In or for a slug casting machine, a mold comprising side and ,end walls defining between them a mold. cavity, and a single; core .member extending substantially throughout the length of the mold cavity, said member bemg supported at the back of the mold by both sidewalls and independently of the endwalls. p 'i 2. In or for a slug casting machine, a mold comprising side and end walls definingbetween them a mold cavity, and a single core member eX ending substantially throughout the length of the mold cavity, said member being supported at the back of the mold by one of the side walls and independently of the end walls.

3. In or for a slug casting machine, a mold. comprising side and end Walls defining be- SOI tween them a mold cavity, and a single core member extending substantially throughout the length of the mold cavity, said member being positioned between the side walls in spaced relation thereto and supported by the mold at the back independently ofthe end walls. i 7

I l. In or for a slug casting machine, a mold comprising side and end walls defining between them a mold cavity, and a'single core member extending substantially throughout the length of the mold cavity, said member being supported at and between its ends at the back of the mold by both side walls and independently of the end walls.

5. In or for a slug casting machine, a mold. comprising cap and body, portions, interme diate liners or end walls, and a core member supported at the back of the mold solely by both the cap and body portions. 9

6. In or for a slug casting machine, a mold comprising side and end walls defining between them a mold cavity, and a coremember positioned between the side walls in spaced relation thereto, said member being supported at its opposite ends and at points therebetween solely by both mold walls.

.7. In or for a slug casting machine, a mold comprising side and end walls defining besidewalls of the I edges of said side walls, for the purpose dethin side walls, reinforcing members applied to the side walls, and a core member supported at the back of the mold by both side walls to the exclusion of the end walls.

9. In or for a slug casting machine, a com posite mold'comprising end walls, relatively thin side walls, reinforcing members applied to the side walls, and a core member provided with lateral supporting arms mounted in transverse notches cut through the rear scribed.

10. I11 a slug casting machine, the combination with a mold comprising cap and body portions, intermediate liners or end walls, and a core member supported at the back of the mold by both the cap and body portions, said core member extending a given distance within the mold cavity, of a quad block formed with a core section extending from the "front of the mold within said cavity but having its rear face terminating short of the front face of the rear core memberffor the purpose described. 1

11. In a slug casting machine, the combination with a mold comprising cap and body portions, intermediate liners or end walls, and a core member supported at the back of the mold by both the cap and body portions, said core member extending a given distance within the mold cavity, of a quad block 7 formed with a plurality of core sections sep arated from each other by intermediate recesses and extending from the front of the mold within said cavity but having their rear its opposite edges with integral arms adapted for attachment to the side walls of the mold. 15. In or for a slug casting mold, a core member formed at its opposite ends and about faces terminating short of the front face of the rear core member.

12. In or for a slug casting machine, a mold comprising side and end walls defining between them a mold cavity, a core member extending substantially throughout the length of the mold cavity and supported at the rear of said'cavity, and a second core member also extending substantially throughout the length of the mold cavity and supported at the front of said cavity, the two core members being separated from each other'to leave a. continuous uninterrupted space between them. I

13. A mold according to claim 12 wherein the front core member is made up of a plurality of sections separated from each other by fore-and-afi recesses.

151:. In or for a. slug casting mold, a core member formed at its opposite ends and on 

